The activity of a novel Ni-Re/Al 2 O 3 catalyst toward partial oxidation of methane was investigated in comparison with that of a precious-metal Rh/Al 2 O 3 catalyst. Reactions involving CH 4 /O 2 /Ar, CH 4 /H 2 O/Ar, CH 4 /CO 2 /Ar, CO/O 2 /Ar, and H 2 /O 2 /Ar were performed to determine the kinetic expressions based on indirect partial oxidation scheme. A mathematical model comprising of Ergun equation as well as mass and energy balances with lumped indirect partial oxidation network was applied to obtain the kinetic parameters and then used to predict the reactant and product concentrations as well as temperature profiles within a fixed-bed microreactor. H 2 and CO production as well as H 2 /CO 2 and CO/CO 2 ratios from the reaction over Ni-Re/Al 2 O 3 catalyst were higher than those over Rh/Al 2 O 3 catalyst. Simulation revealed that much smoother temperature profiles along the microreactor length were obtained when using Ni-Re/Al 2 O 3 catalyst. Steep hot-spot temperature gradients, particularly at the entrance of the reactor, were, conversely, noted when using Rh/Al 2 O 3 catalyst.
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